<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    html{
      /* 
        cursor: default(默认)
                pointer(手型，一般表示可点击的项)
                not-allowed(禁止)
                url()    自定义光标
      */
      cursor: default;
      cursor: pointer;
      cursor: not-allowed;
      cursor: url(./img/hand.png),default;
    }
    button{
      cursor: pointer;
    }
  </style>
</head>
<body>
  <button class="btn">按钮</button>
</body>
</html>